There are three things that prevent sleep, — overfatigue, material disturbances from the outside, and mental disturbances from, within.

It is not uncommon to hear people say, "I was too tired to sleep" — but it is not generally known how great a help it is at such times not to try to sleep, but to go to work deliberately to get I rested in preparation for it. In nine cases out of ten it is the unwillingness to lie awake that keeps us awake. We wonder why we do not sleep. We toss and turn and wish we could sleep. We fret, and fume, and worry, because we do not sleep. We think of all we have to do on the following day, and are oppressed with the thought that we cannot do it if we do not sleep. First, we try one experiment to see if it will not make us sleep, and when it fails, we try another, and perhaps another. In each experiment we, are watching to see if it will work. There are many things to do, any one of which might help us to sleep, but the watching to see if they will work keeps us awake.

When we are kept awake from our fatigue, the first thing to do is to say over and over to ourselves that we do not care whether we sleep or not, in order to imbue ourselves with a healthy indifference about it. It will help toward gaining this wholesome indifference to say "I am too tired to sleep, and therefore, the first thing for me to do is to get rested in order to prepare for sleep. When my brain is well rested, it will go to sleep; it cannot help it. When it is well rested, it will sleep just as naturally as my lungs breathe, or as my heart beats."

In order to rest our brains we want to lie quietly, relaxing all our muscles, and taking even, quiet breaths. It is good when we can take long, full breaths, but sometimes that is too fatiguing; and then we must not only take moderately long, breaths, but be careful to have them gentle, quiet, and rhythmic. To make a plan of breathing and follow it keeps the mind steadily concentrated on the breathing, and gives the rest of the brain, which has been working on other things, a chance to relax and find its own freedom and rest. It is helpful to inhale while we count seven, exhale while we count seven, then rest and breathe naturally while we count seven, and to repeat the series of three for seven times; but to be strict with ourselves and see that we only do it seven times, not once more nor once less.

Then we should wait a little and try it again, — and so keep on for a number of times, repeating the same series; and we should always be sure to have the air in our bedrooms as fresh as possible. If the breathing is steady and rhythmical it helps very much, and to inhale and exhale over and over for half an hour has a very pleasant, quieting effect — sometimes such exercises make us nervous at first, and, if we are very tired, that often happens; but, if we keep steadily at work, the nervousness disappears and restful quiet follows which very often brings restoring and refreshing sleep.

Another thing to remember — and it is very important — is that an overtired brain needs more than the usual nourishment. If you have been awake for an hour, and it is three hours after your last meal, take half a cup, or a cup of hot milk. If you are awake for another two hours take half a cup more, and so, at intervals of about two hours, so long as you are awake throughout the night. Hot milk is nourishing and a sedative.

There are five things to remember to help rest an overtired brain:

1. A healthy indifference to wakefulness.
2. Concentration of the mind on simple things.
3. Relaxation of the body.
4. Gentle rhythmic breathing of fresh air.
5. Regular nourishment.